"The Keystone XL pipeline faces a new, formidable and deep-pocketed foe: Tom Steyer, a California billionaire, has targeted the controversial Canadian project to funnel Alberta’s landlocked heavy crude to Texas refineries on the Gulf Coast."

"For Mr. Steyer, Keystone “has become the defining issue in the climate change fight of our times,” said Chris Lehane, Mr. Steyer’s authorized spokesman. “He has plenty of resources and plays to win,” Mr. Lehane said in an interview after Mr. Steyer waded into the Democratic primary race in Massachusetts with a threat to skewer a pro-Keystone candidate. That race is to select the party’s candidate for the Senate seat vacated by John Kerry, an ardent environmentalist who, as secretary of state, will also play a key role in Keystone’s fate."